Sound recording equipment for schools.
Contributors: Van Dyke, Karl Skillman, 1892-; Brown, Richard Leland, 1912-
Publisher: Committee on scientific aids to learning
Published: 1940
Place of publication: New York
Language: eng
Number of pages: 52
Subjects: Sound -- Recording and reproducing.; Schools -- Furniture, equipment, etc.
Notes: "The present report was prepared by Professor Karl S. Van Dyke ... who was assisted by Mr. R. L. Brown. "--Foreword.